Combi Boiler - No hot water

My combi boiler has ceased to produce hot water consistently. When the heating is on, there is intermittent hot water but when the heating is off there is none. It would appear that turning the hot water does not cause the pilot light to fire.

The boiler is a Halstead Ace High. Does anybody know what the likely cause of this is and what sort of cost I can expect.

Best Answerits almost certainly a failed diaphragm in the diverter valve, i would be inclined to change the whole valve rather than just the diaphragm (dependant on whether the head of the valve that contains the diaphragm is easy or hard to get at). cost wise, halstead parts tend to be very expensive, to change the whole valve i would guess around £125, to change just the...

its almost certainly a failed diaphragm in the diverter valve, i would be inclined to change the whole valve rather than just the diaphragm (dependant on whether the head of the valve that contains the diaphragm is easy or hard to get at). cost wise, halstead parts tend to be very expensive, to change the whole valve i would guess around £125, to change just the diaphragm around £75.

My Worcester Bosch boiler provides hot water fine. When I put the central heating on, the water is not being pumped through the radiators. I remember on old systems you could take the plug out of the...

I have a Vokera Excell80SP combi boiler and am having a problem with hot water. The central heating works fine, but when you turn on a hot tap you get a limited amount of hot water then it runs cold,...